package com.team6.yygh.user.api;

import com.alibaba.fastjson.JSONObject;
import com.team6.yygh.helper.JwtHelper;
import com.team6.yygh.model.user.UserInfo;
import com.team6.yygh.result.Result;
import com.team6.yygh.user.service.UserInfoService;
import com.team6.yygh.user.utils.ConstantWxPropertiesUtils;
import com.team6.yygh.user.utils.HttpClientUtils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

/**
 * @ClassName WeixinApiController
 * @Author ZhuYouWan
 * @Date 2022/10/24 21:00
 **/
@Api(tags = "微信登录")
@Controller
@RequestMapping("/api/ucenter/wx")
public class WeixinApiController {

    @Autowired
    private UserInfoService userInfoService;
    /**
     * 微信扫描后回调的方法
     */
    @ApiOperation(value = "微信扫描后回调的方法")
    @GetMapping("callback")
    public String callback(String code, String state){
        // 第一步，获取临时票据 code
        System.out.println("code:"+code);
        // 第二步，用code和微信id和密钥，请求微信固定地址，得到两个值
        //使用code和appid以及appscrect换取access_token
        StringBuffer baseAccessTokenUrl = new StringBuffer()
                .append("https://api.weixin.qq.com/sns/oauth2/access_token")
                .append("?appid=%s")
                .append("&secret=%s")
                .append("&code=%s")
                .append("&grant_type=authorization_code");
        String accessTokenUrl = String.format(baseAccessTokenUrl.toString(),
                ConstantWxPropertiesUtils.WX_OPEN_APP_ID,
                ConstantWxPropertiesUtils.WX_OPEN_APP_SECRET,
                code);
        try {
            String accesstokenInfo = HttpClientUtils.get(accessTokenUrl);
            System.out.println("accesstokenInfo:"+accesstokenInfo);
            // 从返回的字符串获取两个值 openid 和 accessToken
            JSONObject jsonObject = JSONObject.parseObject(accesstokenInfo);
            String accessToken = jsonObject.getString("access_token");
            String openid = jsonObject.getString("openid");
            // 判断数据库是否存在微信的扫描人信息
            // 根据openid判断
            UserInfo userInfo = userInfoService.selectWxInfoOpenID(openid);
            if (userInfo == null){
                // 第三步 用openid 和 access_token 请求微信地址，得到扫描人信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                String userInfoUrl = String.format(baseUserInfoUrl, accessToken, openid);
                String resultInfo = HttpClientUtils.get(userInfoUrl);
                System.out.println("resultInfo:"+resultInfo);
                JSONObject resultUserInfoJson = JSONObject.parseObject(resultInfo);
                // 解析用户信息
                // 微信昵称
                String nickname = resultUserInfoJson.getString("nickname");
                // 微信头像
                String headimgurl = resultUserInfoJson.getString("headimgurl");
                // 获取扫描人信息存入数据库
                userInfo = new UserInfo();
                userInfo.setOpenid(openid);
                userInfo.setNickName(nickname);
                userInfo.setStatus(1);
                userInfoService.save(userInfo);
            }
            // 返回name和token字符串
            Map<String, Object> map = new HashMap<>();
            String name = userInfo.getName();
            if(StringUtils.isEmpty(name)) {
                name = userInfo.getNickName();
            }
            if(StringUtils.isEmpty(name)) {
                name = userInfo.getPhone();
            }
            map.put("name", name);
            // 判断userInfo中是否有手机号，如果手机号为空，返回openid
            // 如果手机号不为空，返回openid值是空字符串
            // 前端判断：如果openid不为空，绑定手机号，如果openid为空，不需要绑定手机号
            if(StringUtils.isEmpty(userInfo.getPhone())) {
                map.put("openid", userInfo.getOpenid());
            } else {
                map.put("openid", "");
            }
            String token = JwtHelper.createToken(userInfo.getId(), name);
            map.put("token", token);
            // 跳转到前端页面
            return "redirect:" + ConstantWxPropertiesUtils.YYGH_BASE_URL
                    + "/weixin/callback?token="+map.get("token")
                    +"&openid="+map.get("openid")
                    +"&name="+URLEncoder.encode((String) map.get("name"), "UTF-8");
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 生成微信扫描二维码，返回生成二维码需要的参数
     */
    @ApiOperation(value = "生成微信二维码")
    @GetMapping("getLoginParam")
    @ResponseBody
    public Result genQrConnect() throws UnsupportedEncodingException {
        Map<String, Object> map = new HashMap<>();
        map.put("appid", ConstantWxPropertiesUtils.WX_OPEN_APP_ID);
        map.put("scope", "snsapi_login");
        String redirectUri = URLEncoder.encode(ConstantWxPropertiesUtils.WX_OPEN_REDIRECT_URL, "UTF-8");
        map.put("redirectUri", redirectUri);
        map.put("state", System.currentTimeMillis()+"");
        return Result.ok(map);
    }
}
